swift: touch: to avoid enabling/disabling touch more than once

Change-Id: I83b5aaf5c6cda98294a5907c1eb64b3bfcd45386
Reviewed-on: http://mcrd1-22-pc.corpnet.asus/code-review/master/254989
Reviewed-by: Nina_Han <nina_han@asus.com>
Tested-by: Nina_Han <nina_han@asus.com>
Reviewed-by: Eric1 Lin <Eric1_Lin@asus.com>
2 files changed